.goods-body {
    width: 500px;
    margin: 50px auto;
    border: 1px #ccc solid;
    height: 600px;
}
.show-goods{
    display: flex;
}
.goods-nav{
    width: 80px;
}
.goods-nav >a{
    display: block;
    height: 30px;
    line-height: 30px;
    background: #f5f5f5;
    text-align: center;
    border-bottom: 1px white solid;
}
.goods-nav >a.active{
    color: white;
    background: red;
}